Cesium carbonate → HCID 67362631、化合物

反応式

[CH3:1][O:2][C:3]([C:5]1[CH:9]=[C:8]([OH:10])[N:7]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=2[F:17])[N:6]=1)=[O:4].C(=O)([O-])[O-].[Cs+].[Cs+].Br[CH2:25][C:26](=[O:31])[C:27]([CH3:30])([CH3:29])[CH3:28]>CN(C=O)C>[CH3:1][O:2][C:3]([C:5]1[CH:9]=[C:8]([O:10][CH2:25][C:26](=[O:31])[C:27]([CH3:30])([CH3:29])[CH3:28])[N:7]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=2[F:17])[N:6]=1)=[O:4]

参加物

反応条件

温度: 50 °C

実験手順

200 mg (0.85 mmol) of 1-(2-fluoro-phenyl)-5-hydroxy-1H-pyrazole-3-carboxylic acid methyl ester were dissolved in 5 ml of DMF. 552 mg (1.7 mmol) of cesium carbonate and 152 mg (0.85 mmol) of 1-bromo-3,3-dimethyl-butan-2-one were added and the mixture was heated to 50° C. for 6 h. Then the mixture was filtered and the solvent removed in vacuo. The obtained crude title compound was subjected to hydrolysis without further purification.